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ups driver doesn't load properly at boot

Description

At boot, the ups driver doesn’t seem to load properly, which causes the nut-server to get in a bad state. Looking at systemctl status nut-server.service, there are a number of these logs:

Aug 15 20:44:02 kaidame nut-server[139231]: Can't connect to UPS [ups] (usbhid-ups-ups): No such file or directory
Aug 15 20:44:02 kaidame upsd[139231]: Can't connect to UPS [ups] (usbhid-ups-ups): No such file or directory

And of course, nut-monitor fails as well with “Driver not connected” messages.

Additionally, when the system boots, I get an email alert that says:

  • Communication with UPS ups lost.

    UPS Statistics: 'ups'

    Statistics could not be recovered

This alert quickly gets cleared, but the UPS is not in fact usable.

It is possible to make the UPS work by issuing a upsdrvctl start command in a root shell:

root@kaidame[~]# upsdrvctl start
Network UPS Tools - UPS driver controller 2.8.0
Network UPS Tools - Generic HID driver 0.47 (2.8.0)
USB communication driver (libusb 1.0) 0.43
Duplicate driver instance detected (PID file /run/nut/usbhid-ups-ups.pid exists)! Terminating other driver!
Using subdriver: CyberPower HID 0.6

After this, upsc ups returns good data.

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Jean-Francois Roy August 23, 2023 at 4:11 PM

Great!

Waqar August 23, 2023 at 3:48 PM

the session is no longer required, the changes have been merged which fix the issue at hand. Thank you for pointing this out winking face

Waqar August 22, 2023 at 2:56 PM

the timing works nicely for me. I’ll be looking forward to test a fix on your machine so we can be sure everything is good and working as desired. Thanks! (please email me teamviewer credentials at waqar@ixsystems.com a few minutes before the time)

Jean-Francois Roy August 21, 2023 at 5:28 PM

Based on https://wiki.archlinux.org/title/Network_UPS_Tools , it seems TrueNAS Scale should enable (as in systemctl enable) nut-driver-enumerator.service, nut.target, and nut-driver.target. After doing so in a shell, and rebooting the system, the issue is resolved.

Jean-Francois Roy August 21, 2023 at 4:08 PM

I can do August 23 at 9 am PDT.

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Katalon Platform

Created August 16, 2023 at 4:01 AM
Updated February 27, 2025 at 9:14 PM
Resolved August 23, 2023 at 3:48 PM

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